tunable external-cavity diode laser 可调谐外腔半导体激光器 a cateye reflector and ultranarrow filter replace the alignment-sensitive diffraction grating of conventional littrow and litman-metcalf designs atom cooling and trapping laser frequency stabilization laser spectroscopy raman effect atomic clock optical frequency standard atomic magnetometer atomic interferometer atomic gyroscope nonlinear optical bio-medical laser radar optical communications tunable external-cavity diode lasers laser wavelength 780nm, 852nm others availabe on request from 400nm to 1000nm output power up to 30 mw, diode dependent linewidth, fwhm typically <150 khz wavelength tuning typical 10 nm others check for details